65677481 has 4 divisors (see below), whose sum is σ = 65693700. Its totient is φ = 65661264.

The previous prime is 65677463. The next prime is 65677483. The reversal of 65677481 is 18477656.

65677481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 32718400 + 32959081 = 5720^2 + 5741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65677481 is a prime.

It is a super-2 number, since 2×65677481² = 8627063021010722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65677483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3635 + ... + 12023.

It is an arithmetic number, because the mean of its divisors is an integer number (16423425).

Almost surely, 2^65677481 is an apocalyptic number.

It is an amenable number.

65677481 is a deficient number, since it is larger than the sum of its proper divisors (16219).

65677481 is an equidigital number, since it uses as much as digits as its factorization.

65677481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16218.

The product of its digits is 282240, while the sum is 44.

The square root of 65677481 is about 8104.1644233073. The cubic root of 65677481 is about 403.4646558390.

The spelling of 65677481 in words is "sixty-five million, six hundred seventy-seven thousand, four hundred eighty-one".